<template>
	<div>
		<!-- 面包屑导航 -->
		<el-breadcrumb separator-class="el-icon-arrow-right">
		  <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
		  <el-breadcrumb-item>权限管理</el-breadcrumb-item>
		  <el-breadcrumb-item>权限列表</el-breadcrumb-item>
		</el-breadcrumb>

		<!-- 卡片视图 -->
		<el-card>
			<!-- 添加角色按钮区域 -->
			<el-row>  <!-- 列 -->
				<el-col>  <!-- 行 -->
					<el-button type="primary">添加角色</el-button>
				</el-col>
			</el-row>

			<!-- 角色列表区域 -->
			<el-table :data="rolelist" border stripe>
				<!-- 展开列 -->
				<el-table-column type="expand">
					<template slot-scope="scope">
						<!-- 栅格系统 -->
						<el-row v-for="(item1, i1) in scope.row.children" :key="item1.id" :class="['bdbottom', i1===0 ? 'bdtop': '', 'vcenter']">

							<!-- 渲染一级权限 -->
							<el-col :span="5">
								<el-tag closable @close="removeRightById(scope.row, item1.id)">{{item1.authName}}</el-tag>
								<i class="el-icon-caret-right"></i>
							</el-col>

							<!-- 渲染二级和三级权限 -->
							<el-col :span="19">
								<!-- 通过for循环嵌套渲染二级权限 -->
								<el-row v-for="(item2, i2) in item1.children" :key="item2.id" :class="['bdtop', i2===0 ? '': 'bdtop', 'vcenter']">
									<el-col :span="6">
										<el-tag type="success" closable @close="removeRightById(scope.row, item2.id)">{{item2.authName}}</el-tag>
										<i class="el-icon-caret-right"></i>
									</el-col>

									<el-col :span="18">
										<el-tag type="warning" v-for="item3 in item2.children" :key="item3.id" closable @close="removeRightById(scope.row, item3.id)">
											{{item3.authName}}
										</el-tag>
									</el-col>
								</el-row>
							</el-col>
						</el-row>
<!-- 
						<pre>
							{{scope.row}}
						</pre> -->
					</template>
				</el-table-column>
				<!-- 索引列 -->
				<el-table-column type="index"></el-table-column>
				<el-table-column label="角色名称" prop="roleName"></el-table-column>
				<el-table-column label="角色描述" prop="roleDesc"></el-table-column>
				<el-table-column label="操作" width="300px">
					<template slot-scope="scope">
						<el-button size="mini" type="primary" icon="el-icon-edit">编辑</el-button>
						<el-button size="mini" type="danger" icon="el-icon-delete">删除</el-button>
						<el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
					</template>
				</el-table-column>
			</el-table>

		</el-card>

		<!-- 分配权限的对话框 -->
		<el-dialog
		  title="分配权限"
		  :visible.sync="setRightDialogVisible"
		  width="50%" @close="setRightDialogClosed">
		  <!-- 树形控件 -->
		  <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all :default-checked-keys="defKeys" ref="treeRef"></el-tree>
		  <template #footer>
		    <span class="dialog-footer">
		      <el-button @click="setRightDialogVisible = false">取 消</el-button>
		      <el-button type="primary" @click="allotRights">确 定</el-button>
		    </span>
		  </template>
		</el-dialog>
	</div>
</template>


<script>
	export default {
		data(){
			return {
				// 所有角色列表
				rolelist: [],
				// 控制分配权限对话框的显示与隐藏
				setRightDialogVisible: false,
				// 所有权限的数据
				rightslist: [],
				// 树形控件的属性绑定对象
				treeProps: {
					label: 'authName',
					children: 'children'
				},
				// 默认选中的节点id值数组
				defKeys: [],
				// 当前即将分配权限的角色id
				roleId: ''
			}
		},
		created(){
			this.getRolesList()
		},
		methods: {
			// 获取所有角色de列表
			async getRolesList(){
				const {data: res} = await this.$http.get('roles')

				if(res.meta.status !== 200){
					return this.$message.error('获取角色列表失败！')
				}
				this.rolelist = res.data

				console.log(this.rolelist)
			},
			// 根据id删除对应的权限
			async removeRightById(role, rightId){
				// 弹框提示用户是否删除
		        const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
		          confirmButtonText: '确定',
		          cancelButtonText: '取消',
		          type: 'warning'
		        }).catch(err => err)

		        if (confirmResult !== 'confirm'){
		        	return this.$message.info('取消了删除')
		        }

		        const {data: res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
		        if (res.meta.status !== 200){
		        	return this.$message.error("删除权限失败")
		        }

		        role.children = res.data
			},
			// 分配权限的对话框
			async showSetRightDialog(role){
				this.roleId = role.id
				// 获取所有权限的数据
				const {data: res} = await this.$http.get('rights/tree')
				if(res.meta.status !== 200) {
					return this.$message.error('获取权限数据失败')
				}
				// 把获取到的数据保存到data中
				this.rightslist = res.data
				console.log(this.rightslist)
				// 递归获取三级节点的id
				this.getLeafKeys(role, this.defKeys)

				this.setRightDialogVisible = true
			},
			// 通过递归的形式，获取角色下所有三级权限的id，保存到defKeys中
			getLeafKeys(node, arr){
				// 如果当前node节点不包含children属性，则是三级节点
				if (!node.children) {
					return arr.push(node.id)
				}

				node.children.forEach(item => this.getLeafKeys(item, arr))
			},
			// 监听分配权限对话框的关闭时间
			setRightDialogClosed(){
				this.defKeys = []
			},
			// 点击确定为角色分配权限
			async allotRights(){
				const keys = [
					...this.$refs.treeRef.getCheckedKeys(),
					...this.$refs.treeRef.getHalfCheckedKeys()
				]
				console.log(keys)
				const idStr = keys.join(',')
				const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
				console.log(res)
				if (res.meta.status !== 200){
					return this.$message.error('分配权限失败')
				}
				this.$message.success('分配权限成功')
				this.getRolesList()
				this.setRightDialogVisible = false
			}
		}
	}	
</script>

 
<style lang="less" scoped>
	.el-tag {
		margin: 7px;
	}
	// 下划线
	.bdtop {
		border-top: 1px solid #eee;
	}
	.bdbottom {
		border-bottom: 1px solid #eee;
	}
	// 居中对齐效果
	.vcenter {
		display: flex;
		align-items: center;
	}
</style>